China's output of acrylic fibre reached 508,400 tons in the first 11 months of 2001, up 8.4 per cent on the year ago period, the National Bureau of Statistics (NBS) said on Friday. Other NBS figures revealed Chinese firms made 5.6 million tons of polyester fibre in that period - up 22.8 per cent over the same period last year. Of that, polyester staple fibre amounted to 2.2m tons and polyester filament fibre 3.3m tons.